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Energy savings in CO2 (carbon dioxide) capture using ejectors for waste heat upgrading

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  • Reddick, Christopher
  • Sorin, Mikhail
  • Rheault, Fernand

Abstract

The biggest technical barrier to full scale deployment of absorption technology for post-combustion carbon capture in electric power plants is the high energy consumption for solvent regeneration. This paper presents a new application of ejectors to upgrade external waste heat for the purpose of reducing the amount of valuable turbine steam that is required to supply the solvent regeneration process. A shortcut method is proposed to model and optimize a coal fired post-combustion CO2 capture process enhanced with ejector driven waste heat upgrading. Although the method can be used for any solvent, MEA (monoethanolamine) is the reference solvent for this study. The study evaluates the influence of the position of the point of steam injection into the stripper tower, the CO2 loading of the solvent entering the reboiler from the stripper, the stripper pressure, and the source of the secondary ejector steam. By using the proposed method it is found that the optimal ejector integration allows a 10–25% reduction in the amount of valuable steam. The best results occur when the injected steam is sent to the bottom of the stripper tower, partially replacing the valuable steam from the power plant with waste heat derived steam.

Suggested Citation

  • Reddick, Christopher & Sorin, Mikhail & Rheault, Fernand, 2014. "Energy savings in CO2 (carbon dioxide) capture using ejectors for waste heat upgrading," Energy, Elsevier, vol. 65(C), pages 200-208.
    • Handle: RePEc:eee:energy:v:65:y:2014:i:c:p:200-208
    DOI: 10.1016/j.energy.2013.12.002
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    References listed on IDEAS

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    1. Leites, I.L. & Sama, D.A. & Lior, N., 2003. "The theory and practice of energy saving in the chemical industry: some methods for reducing thermodynamic irreversibility in chemical technology processes," Energy, Elsevier, vol. 28(1), pages 55-97.
    2. Olajire, Abass A., 2010. "CO2 capture and separation technologies for end-of-pipe applications – A review," Energy, Elsevier, vol. 35(6), pages 2610-2628.
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    Cited by:

    1. Yoro, Kelvin O. & Daramola, Michael O. & Sekoai, Patrick T. & Armah, Edward K. & Wilson, Uwemedimo N., 2021. "Advances and emerging techniques for energy recovery during absorptive CO2 capture: A review of process and non-process integration-based strategies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 147(C).
    2. Reddick, Christopher & Sorin, Mikhail & Sapoundjiev, Hristo & Aidoun, Zine, 2016. "Carbon capture simulation using ejectors for waste heat upgrading," Energy, Elsevier, vol. 100(C), pages 251-261.
    3. Besagni, Giorgio & Mereu, Riccardo & Inzoli, Fabio, 2016. "Ejector refrigeration: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 53(C), pages 373-407.
    4. Poirier, Michel & Giguère, Daniel & Sapoundjiev, Hristo, 2018. "Experimental parametric investigation of vapor ejector for refrigeration applications," Energy, Elsevier, vol. 162(C), pages 1287-1300.
    5. Lindqvist, Karl & Jordal, Kristin & Haugen, Geir & Hoff, Karl Anders & Anantharaman, Rahul, 2014. "Integration aspects of reactive absorption for post-combustion CO2 capture from NGCC (natural gas combined cycle) power plants," Energy, Elsevier, vol. 78(C), pages 758-767.
    6. Perevertaylenko, Olexander Yu. & Gariev, Andriy O. & Damartzis, Theodoros & Tovazhnyanskyy, Leonid L. & Kapustenko, Petro O. & Arsenyeva, Olga P., 2015. "Searches of cost effective ways for amine absorption unit design in CO2 post-combustion capture process," Energy, Elsevier, vol. 90(P1), pages 105-112.
    7. Jafarian, Ali & Azizi, Mohammad & Forghani, Pezhman, 2016. "Experimental and numerical investigation of transient phenomena in vacuum ejectors," Energy, Elsevier, vol. 102(C), pages 528-536.
    8. Yue Hu & Yachi Gao & Hui Lv & Gang Xu & Shijie Dong, 2018. "A New Integration System for Natural Gas Combined Cycle Power Plants with CO 2 Capture and Heat Supply," Energies, MDPI, vol. 11(11), pages 1-13, November.
    9. Garlapalli, Ravinder K. & Spencer, Michael W. & Alam, Khairul & Trembly, Jason P., 2018. "Integration of heat recovery unit in coal fired power plants to reduce energy cost of carbon dioxide capture," Applied Energy, Elsevier, vol. 229(C), pages 900-909.
    10. Sharifi, Navid & Sharifi, Majid, 2014. "Reducing energy consumption of a steam ejector through experimental optimization of the nozzle geometry," Energy, Elsevier, vol. 66(C), pages 860-867.
    11. Shan, Yong & Zhang, Jing-zhou & Ren, Xiao-wen, 2018. "Numerical modeling on pumping performance of piccolo-tube multi-nozzles supersonic ejector in an oil radiator passage," Energy, Elsevier, vol. 158(C), pages 216-227.
    12. Li, Long & Liu, Weizao & Qin, Zhifeng & Zhang, Guoquan & Yue, Hairong & Liang, Bin & Tang, Shengwei & Luo, Dongmei, 2021. "Research on integrated CO2 absorption-mineralization and regeneration of absorbent process," Energy, Elsevier, vol. 222(C).

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    Keywords

    CO2 capture; Post-combustion; Ejector; Waste heat; MEA;
    All these keywords.

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